The Little Android (Lunar Chronicles #2.5) by Marissa Meyer

The Little Android is a retelling of The Little Mermaid, set in the world of The Lunar Chronicles by New York Times-bestselling author Marissa Meyer.

When android Mech6.0, saves the life of a handsome hardware engineer, her body is destroyed and her mechanics discover a glitch in her programing. Androids aren’t not meant to develop unpractical reasoning or near-emotional responses…let alone fall in love.